Toothbrush



FIG. 1 is a perspective view of a first embodiment of a toothbrush, showing my new ornamental design;

FIG. 2 is a back view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a right-side view thereof;

FIG. 6 is a left-side view thereof; and

FIG. 7 is a top view thereof.

FIG. 8 is a perspective view of a second embodiment of a toothbrush, showing my new ornamental design;

FIG. 9 is a back view thereof;

FIG. 10 is a bottom view thereof;

FIG. 11 is a front view thereof;

FIG. 12 is a right-side view thereof;

FIG. 13 is a left-side view thereof; and,

FIG. 14 is a top view thereof. 

The ornamental design for a toothbrush, as shown and described. 